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The anti-proliferative effect on breast epithelial (MCF 10A) and cancer cells (MDA-MB-231) of total Calendula officinalis flowers extract, obtained (A) in 10 mM buffer phosphate, pH 7.0; (B) in hexane; and (C) in methanol. Each point is the mean of the results (percentage values) of 3 independent experiments performed in triplicate. The error bars show 95% confidence intervals.
